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Car Forum / Chevrolet / Chevrolet Corvette / August 2004Spark Plugs for 89
Hi I'll be changing my spark plugs soon. I was just wondering if any of you used other brands other than the GM brand. Results? Thanks Dan 89 Coupe Blk on Blk >wassup350@hotmail.com >Date: 8/25/04 12:54 PM Central >Hi > >I'll be changing my spark plugs soon. I was just wondering if any of you >used other brands other than the GM brand. Results? I just use AC Delcos. Some people use Bosch. I heard a few pros and cons about them. >Hi > [quoted text clipped - 5 lines] >Dan >89 Coupe Blk on Blk I have Bosch in my '88 - no problems. -Wayne ************************************************ "Don't let it end like this. Tell them I said something." - last words of Pancho Villa (1877-1923) Thanks Guys... I had Bosch in mind, but I also heard a few pros and cons about them. I'll stick to AC's for now... Dan > >Hi > > [quoted text clipped - 14 lines] > "Don't let it end like this. Tell them I said something." > - last words of Pancho Villa (1877-1923) Dan, Either way you get good plugs. I recently put in the Bosch Platinum+4 (4 electrodes) and they seem very good, maybe 50 RPM idle increase and random pinging at times has not come back. http://www.boschusa.com/AutoParts/SparkPlugs/PlatinumPlus4/ Plus kinda weird to see on Spark Plugs, a money back guarantee ! "Bosch Platinum+4 Satisfaction Guarantee Robert Bosch Corporation guarantees that you will feel the improved performance in your vehicle when you use Bosch Platinum+4 spark plugs. If you do not experience smoother acceleration, improved fuel efficiency and optimal engine performance, return the plugs with your dated sales receipt and Bosch will refund the purchase price of the spark plugs"  SignatureTedd Riggs Redmond, WA 1998 C5 6 spd > Thanks Guys... > [quoted text clipped - 21 lines] >> "Don't let it end like this. Tell them I said something." >> - last words of Pancho Villa (1877-1923) Bosch Platinum 4. > Hi > [quoted text clipped - 5 lines] > Dan > 89 Coupe Blk on Blk Whoa....for once somebody agreed with me <g> SignatureTedd Riggs Redmond, WA 1998 C5 6 spd > Bosch Platinum 4. > [quoted text clipped - 7 lines] >> Dan >> 89 Coupe Blk on Blk In my 89 I run the AC Delco Rapid-fire. Have used Bosh but seemed the power was down a little so I changed back. Don't get me wrong the Bosh plugs idled better but it just seemed they weren't hot enough to make a complete burn when I floored it. Mike > Hi > [quoted text clipped - 5 lines] > Dan > 89 Coupe Blk on Blk Glad you mentioned Rapid Fire. Those are the ones I want to try. Thanks..Have a great weekend. > In my 89 I run the AC Delco Rapid-fire. > Have used Bosh but seemed the power was down a little so I changed back. [quoted text clipped - 12 lines] > > Dan > > 89 Coupe Blk on Blk i ran the rapid fires in my 88 and was not impressed.. too much enging ping.. switched to SPLITFIRES.. have about 10K on the splitfires with no problems.. troy 88 35th anniversary > Glad you mentioned Rapid Fire. Those are the ones I want to try. > [quoted text clipped - 16 lines] > > > Dan > > > 89 Coupe Blk on Blk Lets talk about Bosch for a minute. If you look under the hood of your c4 you will see a smattering of OEM Bosch parts, considering Bosch plugs is not a sin from a purists' point of view, therefore. They are German, which for many years has stood for good engineering. There is some truth to this I hate to admit. If you like the Splitfires, and I have used them in many applications, then you will love the Bosch p4s'. Their spark arc is even greater being split between 4 contacts. Besides Bosch owns splitfire anyway. As far as I am concerned their are only 2 ways to go OEM AC Delco or Bosch p4. If you have any issues with them you can try some Accel goodies on you ditributor, even if it is just the cap, as well as some good performance oriented wires. Just doing the plugs is never enough to really notice anything anyway. You can't really expect to see performance GAINS from a simple plug upgrade. You know you have good plugs when you don't know they are there, meaning there is no noticeable performance lag. When your engine is running smoothly and is responsive and you are getting gas mileage the manufacturer says you should, then, your plugs are doing their job. > Hi > [quoted text clipped - 5 lines] > Dan > 89 Coupe Blk on Blk > Lets talk about Bosch for a minute. > If you look under the hood of your c4 you will see a smattering of OEM [quoted text clipped - 5 lines] > then you will love the Bosch p4s'. Their spark arc is even greater > being split between 4 contacts. ---------<snip>------------ The only problem I have with the multi-electrode spark plugs Is that unless you are running a MSD (multi-spark discharge) were you have more than one rapidly firing spark pulse at the plug isn't the spark going to travel to whichever electrode is at the shortest gap??? They came out with these plugs back in the late 50's - early 60's and everyone finally wised up and determined it was a waste of money because of what I mentioned above. -Diode- You are the electronics' guru in this group am I right or not? Mike >> Lets talk about Bosch for a minute. >> If you look under the hood of your c4 you will see a smattering of OEM [quoted text clipped - 16 lines] >-Diode- You are the electronics' guru in this group am I right or not? > Mike Pick a plug that puts the spark in the same place (inside the combustion chamber that the original AC plug had it. Regards, ..... the other "Mike" -- mikeellison3xxxatzzzyahoo.com -- FWIW, I agree. One spark, one arc. It might switch from one electrode to the next or even fork from time to time but they can't engineer that into what is, effectively, a simple electrical design. Having said that, the fact that the electrodes are moved to the side suggests that the spark is presented to the cylinder to produce a flame front better as opposed to a conventional electrode configuration that can shield it (kinda). I say "kinda" because the gases envelope the plug and are turbulently swishing around. The spark ignites the mixture and the flame front does the rest. You may very well see similar performance from the OEM plugs if you index them. FWIW, Jim > > Lets talk about Bosch for a minute. > > If you look under the hood of your c4 you will see a smattering of OEM [quoted text clipped - 16 lines] > -Diode- You are the electronics' guru in this group am I right or not? > Mike "One spark, one arc. It might switch from one electrode to > the next or even fork from time to time but they can't engineer that into > what is, effectively, a simple electrical design." P4's guarantee at least 1 spark anyway. I have experienced better gas muleage from the as well. > FWIW, I agree. One spark, one arc. It might switch from one electrode to > the next or even fork from time to time but they can't engineer that into [quoted text clipped - 31 lines] > > -Diode- You are the electronics' guru in this group am I right or not? > > Mike TheKid! spoke thusly: >>>-Diode- You are the electronics' guru in this group am I right or not? Whoops, almost missed this, sorry. I've been in the electronics industry for a long time but I don't consider myself a "guru". That being said, more than just the distance determines where a spark will jump to. A spark will jump a longer gap if the conditions are "better" than the ones to the shorter gap. It also depends on the duration of the spark. I suppose IF the duration is long enough, the spark can jump to multiple points. The same could hold true for the MSD systems. Why don't one of you guys with a lot of time on your hands run some experiments with one electrode and multi-electrode plugs and see what happens? Connect a coil to the plug and feed the coil a chopped DC signal (not an AC signal). It's not the same conditions, granted, but it should tell you something. When you're done, you can use the test jig to make a nifty "Jacobs Ladder" like from the old horror movies. :o) SignatureShut up, Dave. -|>|- Diode -|<|- '68 L-79 Coupe '79 Triumph Bonneville |
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